Best uses for old DeWalt HSS planer blades

I’ve got one set of old dewalt blades from a 734 planer that are worn out and I’m trying to figure out if they have any real use. I have discovered that HSS is relatively easy to grind in that you don’t have to watch the temperature as much; as long as it doesn’t glow red the temper is unaffected. But I’ve also learned that I don’t have a drill bit that can make a dent in one of the blades; I’m hoping a grinding bit on the dremel will do the job. One thought is a knife, possibly a marking knife though I was thinking a small replacement blade for my folding knife. Any other ideas or thoughts of what can be made with these blades?

If you can heat the tang red hot and have a steel plate with a hole in it and a good punch, you can punch a hole through those, much easier than drilling or grinding, if you keep the heat away from the blade, you donot have to worry about its temper.

I ask because I made the bonehead move of planing a screw head with my 735. Having a un-planed ridge on the face of the board isn’t the end of the world as I usually hit the surface with a #7 anyway. Still, I didn’t know if I should try to re-sharpen them, buy new or spring for a helical cutter.

They can be sharpened but as they are sharpened the measurement guides/gauges will be off and need to be reset. Plus if they aren’t sharpened right you could end up with a wavy or uneven (thicker on one end than the other) surface. Eventually you will not have enough blade left to be able to cut the wood since you can not advance the blade as it is in a fixed location on the drum.

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